Northern Screamer vs Southern Screamer
Chauna chavaria 对比 Chauna torquata
Side-by-Side Comparison
| 属性 | Northern Screamer | Southern Screamer |
|---|---|---|
| 学名 | Chauna chavaria | Chauna torquata |
| 目 | Anseriformes | Anseriformes |
| 科 | Anhimidae | Anhimidae |
| 保护状况 | Least Concern | Least Concern |
| 体长 | — | — |
| 翼展 | 98.6 cm (38.8 in) | 103.4 cm (40.7 in) |
| 体重 | 2345.6666666666665 g (82.74 oz) | 3550.0 g (125.22 oz) |
| 食性 | Herbivore; grazes upland grasses and sedges; arctic breeder wintering on coastal salt marshes and agricultural … | Grazes grasses, sedges, and aquatic vegetation; forms large flocks; diet shifts between wetland plants and … |
| 产卵数 | 2-7 | 2-7 |
| Population Trend | — | — |
Habitat Comparison
Northern Screamer
Freshwater marshes, wet savannas, lake edges, and seasonally flooded grasslands in northern Colombia and northwestern Venezuela. Associated with low-lying wetlands near large rivers and estuaries.
Southern Screamer
Freshwater marshes, seasonally flooded grasslands, lake margins, and wet pampas from Bolivia and Brazil south through Paraguay, Uruguay, and Argentina. Tolerates cattle pastures and modified wetlands.
Song & Call Comparison
Northern Screamer
Loud, far-carrying screaming calls given in chorus by flocks. Call is a ringing 'cchaaaaa'. Less commonly heard than Horned Screamer but still highly vocal in wetland habitat.
Southern Screamer
An extremely loud, resonant screaming duet 'chakka-chakka'. Pairs coordinate their calls. Flocks on wetlands create a powerful cacophony audible over great distances.
Geographic Range & Migration
Northern Screamer
Endemic to the Falkland Islands. Non-migratory; inhabits grasslands and coastal vegetation year-round on this remote archipelago.
Southern Screamer
Breeds on sub-Antarctic islands in the southern Indian Ocean; disperses at sea in austral winter. Pelagic outside breeding season.
保护状况
Northern Screamer
Southern Screamer
How to Tell Them Apart
Northern Screamer
Mostly gray plumage; head and neck grayish with black crown and nape. Bare red facial skin around eye. White cheek patches. Underparts grayish-white. Legs red. Sexes similar.
Southern Screamer
Gray body plumage; head pale gray with black collar on neck. Bare red facial skin at base of bill. White wing patches visible in flight. Legs red. Belly whitish. Sexes …
About These Birds
Northern Screamer
北叫鸭 (Chauna chavaria)，体长约85–95厘米。体羽灰黑色，颈部白色，头部有白色冠羽，脸颊棕色，腿红色。分布于委内瑞拉和哥伦比亚北部的湿地和湖泊。发出响亮嘹亮的叫声，成对或成群活动。
Southern Screamer
角叫鸭 (Chauna torquata)，体长约85–95厘米。体羽灰黑色，颈部白色，翅膀具角质刺突，腿红色，眼红色。分布于南美洲中部湿地，包括巴西、阿根廷和乌拉圭。叫声极响，以水生植物为食。